Concentration of sulfuric acid.



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F. PERRIN.

CONCENTRATION 0F SULFUHIC ACID.

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3 SHEETS-SHEET 2- Figi?.

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F. PERRIN.

CONCENTRATION 0F SULVFURIC ACID. APPLICATION rlLEn Fna. 1. tels.

Patented Apr. 22,1919.

3 SHEETS-SHEET 3.

FERNAND PERRIN, OF VOLVIC, FRANCE.

CONCENTRATION or sULFURI'o ACID.

To llavlwmfft may concern.'

Be it known "that I, 'FERNAND PERRIN, citizen lof the French Republic, residing at Volvic, P'y-de-Dme, France, have invented certain new and i'iseful Improvements in the,ConcentrationofSulfuric Acid, of which the ollowingis a; specification.

This invention relates to improvements in apparatus for the concentration of sulfuric acid, and more particularly in 'those made of lava or Volvic stone or pottery and compricing a -sataratorant' a regnerator.

The improvements chiefly relate to the circulation o'f hot gases in the saturator, which circulation is effected with increased contact of the gases with the acid and consequently utilizes better the heat of the said gases, besides economizing fuel and giving a better and quicker concentration.

The invention also relates to the regenerator which is provided with openings for cleaning, windows and grooves or conduits provided at the bottom surface of the plates and producing a better working owing to an easier cleaning of the apparatus and an improved circulation of the hot gases.

These improvements are illustrated by Way of example in the accompanying drawings in which:

Figure 1 shows in plan the construction of one of the plates of the regenerator,

Fig. 2 is a sectional plan showing the Siaturator,

Fig. 3 is an elevation in section on the line B*B of Fig. 2 and Fig. 4 an elevation in section on the line i *A of Fig. 2.

In the said apparatus, the saturator 1 is of a rectangular shape, made of lava, pottery or an agglomerato resisting the action of sulfuric acid even when hot, joined together and calked. In the interior of the said saturator are placed two longitudinal divisions 2, 3, also of refractory material, which divide the interior of the saturator into three parts, the central part called the gas Hue, and the two lateral parts called the splattering fines.

The gases coming from the producer, are drawn in b v means of a special fan or blower and enter the apparatus through the central fine 4, their progress toward the outlet is stopped by a baille plate 5 which forces them to pass under each division and into the splutlering (lues, but even there the baille plates i', prevent them from continu- Specication of Letters Patent. Application filed February 7, 1919.

Patented Apr. 22, 1919. Serial No. 275,654.

ing to follow their path and force them to pass for the second time through the longitudinal divisions, the gases passing again into the central lue where the stoneS (Fig. 3) arranged on the longitudinal divisions and under the regenerator, forces them to pass again under the divisions for the third time, so that'the gases arrive in the spluttering filles 9, 10, once more.

In Fig2 the arrows show clearly the path followed in the saturator by the gases which, from their admission "to `their escape from lre saturator, remain in thorough Contact with the acid to be concentrated.

The balile plates 5, 6, 7, project to a few centimeters into tlhe acid, so as to make a hydraulic joint, this insures that the gases cannot circulate under the baliie plates While they pass under the divisions.

The acid outlet pipe is provided with a slin'ce valve 11, Fig. 3. bv means of which the level of the acid in t. 1e saturator can be regulated. This pipe is arranged so as to enable the saturator to be drained by removing the said valve, a hole 12 provided in 011e of the bottom stones and facing one of the inspection Windows 13, enables lall mud or other deposit that may have collected during the working, to be completely expelled by means of a, Siphon.

The windows 13 arranged at each side 0f the sat-uralter and those 14, l5 provided under the regencrator, are for the purpose of removing any sulfatos of iron that may have been produced in the form of crystals along the longitudinal divisions or under the plates in the spluttering lues 9, 10. This novel construction makes a quick and thorough cleaning of the apparatus possible.

n leaving the saturator, the hot gases are drawn into a regenerator which, among other advantages, presents that of doing away with the use of porcelain or oher parts intended to retain the gases in contact with the acid. The plates 17 constituting the regenerator, are in one or more parts, and their dimensions vary to suit the size of the apparatus, they are provided at the bottoni part with bosses or projections, the 0bjectol which is to keep back t'he gases and to prevent them from circulating too quickly from a lower plate to an upper one. Each boss is also provided with a longitudinal V-shapcd groove lli. the object of which is to form an obstacle to an excessively quick traveling of the gases which are thus maintained in thorough contact with dhe acid to be concentrated which is in the cup formed by the upper part of the plate.

Cleaning holes 18 provided half in an upper plate and half in a lower plate2 make possible a, quick and thorough cleaning of each plate. Expulsion of the deposits can be effected from the saturator through the openings 19 which forma passage for the gases drawn into the condenser and to the acid to be concentrated.y

With the apparatus described, i-t is ossible to obtain a regularand easy pr uction of an acid concentrated to 97-98% IZO* with a minimum consumption Aof ue i What I claim as-m invention and desire to secure by Letters atent is In an apparatusfor the concentration of Copies of this patent may be `obtained for with a regeninto the central flue so as to force the hot gases to pass under the said partitions'into the lateral fines, baflie plates projecting into the lateral iues, forcing the hot ases to pass under the said partitions back into the central Bue, and a means for forcing the hot gases back once more into the lateral lines. In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

n FERNAND PERRIN. Witnesses:

GEORGES Tarma, Ronnn'r TANGE,

ave centl each, by allai-elsingl the ,"Gommillioner o! retenu, Washington, D. 0. i p 

